Uv sensor head and wavelength conversion member for uv sensor head

Abstract

A UV sensor head is provided capable of increasing sensing sensitivity. A UV sensor head 1 that converts ultraviolet light into visible light and guides the converted visible light toward an optical fiber 11 includes a wavelength conversion member having an inorganic matrix and phosphor particles dispersed in the inorganic matrix.

1 . A UV sensor head that converts ultraviolet light into visible light and guides the converted visible light toward an optical fiber, the UV sensor head comprising a wavelength conversion member including an inorganic matrix and phosphor particles dispersed in the inorganic matrix. 
     
     
         2 . The UV sensor head according to  claim 1 , wherein a content of the phosphor particles in the wavelength conversion member is 0.01 volume % or more and 20 volume % or less. 
     
     
         3 . The UV sensor head according to  claim 1 , further comprising:
 a tubular body having a first end and a second end facing each other, and a side surface connecting the first end and the second end, the side surface being provided with a cutout portion, wherein   the wavelength conversion member is housed inside the tubular body, and   the wavelength conversion member is arranged to overlap the cutout portion in a plan view.   
     
     
         4 . The UV sensor head according to  claim 3 , wherein, when a direction in which the first end and the second end are connected is defined as a lengthwise direction and the first end is an end provided on to the optical fiber side, the wavelength conversion member has a protrusion that protrudes toward the first end side beyond the cutout portion in the lengthwise direction. 
     
     
         5 . The UV sensor head according to  claim 4 , wherein a ratio of a length of the protrusion of the wavelength conversion member to a length of the cutout portion in the lengthwise direction (protrusion/cutout portion) is 0.01 or more and 1 or less. 
     
     
         6 . The UV sensor head according to  claim 3 , wherein a filter that transmits ultraviolet light and absorbs or reflects visible light is provided on the cutout portion. 
     
     
         7 . The UV sensor head according to  claim 6 , wherein the filter is made of glass. 
     
     
         8 . The UV sensor head according to  claim 3 , wherein, when the first end is an end provided on the optical fiber side, a rod made of the wavelength conversion member is inserted from the second end side of the tubular body. 
     
     
         9 . The UV sensor head according to  claim 8 , further comprising:
 a lid member closing the second end side of the tubular body, wherein   the rod is attached to the lid member.   
     
     
         10 . The UV sensor head according to  claim 1 , wherein the inorganic matrix is a glass matrix. 
     
     
         11 . A wavelength conversion member for a UV sensor head, the wavelength conversion member being used for a UV sensor head that converts ultraviolet light into visible light and guides the converted visible light toward an optical fiber, the wavelength conversion member comprising an inorganic matrix and phosphor particles dispersed in the inorganic matrix. 
     
     
         12 . The wavelength conversion member for the UV sensor head according to  claim 11 , wherein a content of the phosphor particles in the wavelength conversion member is 0.01 volume % or more and 20 volume % or less. 
     
     
         13 . The UV sensor head according to  claim 2 , further comprising:
 a tubular body having a first end and a second end facing each other, and a side surface connecting the first end and the second end, the side surface being provided with a cutout portion, wherein   the wavelength conversion member is housed inside the tubular body, and   the wavelength conversion member is arranged to overlap the cutout portion in a plan view.   
     
     
         14 . The UV sensor head according to  claim 13 , wherein, when a direction in which the first end and the second end are connected is defined as a lengthwise direction and the first end is an end provided on to the optical fiber side, the wavelength conversion member has a protrusion that protrudes toward the first end side beyond the cutout portion in the lengthwise direction. 
     
     
         15 . The UV sensor head according to  claim 14 , wherein a ratio of a length of the protrusion of the wavelength conversion member to a length of the cutout portion in the lengthwise direction (protrusion/cutout portion) is 0.01 or more and 1 or less. 
     
     
         16 . The UV sensor head according to  claim 13 , wherein a filter that transmits ultraviolet light and absorbs or reflects visible light is provided on the cutout portion. 
     
     
         17 . The UV sensor head according to  claim 16 , wherein the filter is made of glass. 
     
     
         18 . The UV sensor head according to  claim 13 , wherein, when the first end is an end provided on the optical fiber side, a rod made of the wavelength conversion member is inserted from the second end side of the tubular body. 
     
     
         19 . The UV sensor head according to  claim 18 , further comprising:
 a lid member closing the second end side of the tubular body, wherein   the rod is attached to the lid member.   
     
     
         20 . The UV sensor head according to  claim 2 , wherein the inorganic matrix is a glass matrix.